Su alcune proprietà geometriche dei flussi piani relativistici

Abstract

The equations governing the steady barotropic piane motion of a relativistic ideal isentropic fluid, in the absence of external mass forces, are transformed, by using a curvilinear «natural» coordinate system in the piane of motion. The parametric equations of relativistic streamlines are deduced in particular cases, and the geometric properties which they verify are in such cases established. Successively, ulterior geometric properties of the fiow in question are determined, in connection with the relativistic Mach number.